SUMMARY: In response to requests from interested parties, the Mine
Safety and Health Administration (MSHA) is extending the comment period
on the proposed rule addressing Lowering Miners' Exposure to Respirable
Coal Mine Dust, Including Continuous Personal Dust Monitors. This
extension gives commenters additional time to review and comment on the
proposed rule.

DATES: The comment period for the proposed rule published on October
19, 2010 (75 FR 64412), extended January 14, 2011 (76 FR 2617) and May
4, 2011 (76 FR 25277), is further extended. All comments must be
received or postmarked by midnight Eastern Daylight Saving Time on June
20, 2011.

ADDRESSES: Comments must be identified with ``RIN 1219-AB64'' and may
be sent by any of the following methods:
(1) Federal e-Rulemaking Portal: http://www.regulations.gov. Follow
the instructions for submitting comments.
(2) Facsimile: 202-693-9441. Include ``RIN 1219-AB64'' in the
subject line of the message.
(3) Regular Mail: MSHA, Office of Standards, Regulations, and
Variances, 1100 Wilson Boulevard, Room 2350, Arlington, Virginia 22209-
3939.
(4) Mail or Hand Delivery: MSHA, Office of Standards, Regulations,
and Variances, 1100 Wilson Boulevard, Room 2350, Arlington, Virginia.
Sign in at the receptionist's desk on the 21st floor.
MSHA will post all comments without change, including any personal
information provided. Access comments electronically on http://www.regulations.gov and on MSHA's Web site at http://www.msha.gov/currentcomments.asp. Review comments in person at the Office of
Standards, Regulations, and Variances, 1100 Wilson Boulevard, Room
2350, Arlington, Virginia. Sign in at the receptionist's desk on the
21st floor.
MSHA maintains a list that enables subscribers to receive e-mail
notification when the Agency publishes rulemaking documents in the
Federal Register. To subscribe, go to http://www.msha.gov/subscriptions/subscribe.aspx.

On October 19, 2010 (75 FR 64412), MSHA published a proposed rule,
Lowering Miners' Exposure to Respirable Coal Mine Dust, Including
Continuous Personal Dust Monitors, twice extending the comment period
now set to close May 31, 2011. On May 19, 2011, MSHA posted historical
information and data on respirable coal mine dust on its End Black
Lung--ACT NOW! Single Source Web page. Although MSHA does not believe
this information is necessary to comment on the proposed rule, MSHA is
providing additional time for interested parties to submit comments.
MSHA is extending the comment period from May 31, 2011 to June 20,
2011. All comments and supporting documentation must be received or
postmarked by June 20, 2011.